Alaska-Pacific River Forecast Center

Alaska-Pacific River Forecast Center
Name	Alaska-Pacific River Forecast Center
Formed	1998
Jurisdiction	National Oceanic and Atmospheric Administration United States Alaska
Headquarters	Anchorage, Alaska
Parent agency	National Weather Service

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Alaska-Pacific River Forecast Center

The Alaska-Pacific River Forecast Center is a regional hydrologic forecasting office of the National Weather Service responsible for river and hydrologic forecasts across much of Alaska, the Aleutian Islands, and parts of the Pacific Ocean drainage basins. It provides flood warnings, hydrologic analyses, and operational forecast guidance that support emergency management, transportation, U.S. Coast Guard, and resource management across remote and urban watersheds. The center coordinates with federal, state, tribal, and municipal partners including the National Oceanic and Atmospheric Administration, United States Geological Survey, and the Federal Emergency Management Agency.

History

The center was established in 1998 as part of a broader reorganization within the National Weather Service and National Oceanic and Atmospheric Administration to consolidate river forecasting operations that formerly resided in multiple regional offices. Its creation followed decades of hydrologic work by the United States Geological Survey and regional offices such as the Alaska Weather Service Office and predecessors tied to Civil Aeronautics Administration and Weather Bureau operations. Historical drivers included lessons from notable events like the 1964 Alaska earthquake and recurring flood episodes on the Susitna River, Yukon River, and along coastal estuaries near Anchorage, Alaska. Over time the center integrated advances from programs such as the Hydrologic Research Laboratory, collaborations with the University of Alaska Fairbanks, and initiatives tied to the National Water Center.

The center’s mission aligns with national directives from the National Weather Service and National Oceanic and Atmospheric Administration to provide timely hydrologic forecasts and warnings. It issues river stage forecasts, flood and flash flood warnings, and real-time hydrologic analyses to support partners including the Federal Emergency Management Agency, Alaska Department of Natural Resources, Alaska Division of Homeland Security and Emergency Management, and local borough governments such as the Municipality of Anchorage and Matanuska-Susitna Borough. Responsibilities extend to maritime stakeholders like the United States Coast Guard and infrastructure agencies including the Alaska Railroad and Alaska Department of Transportation and Public Facilities. The center also supports water resource managers at entities such as the Bureau of Reclamation and energy operators tied to the Alaska Energy Authority.

Operational products include river stage forecasts, flood watches and warnings, snowmelt and runoff forecasts for basins such as the Kuskokwim River, Copper River, and Tanana River, and hydrologic model outputs used by the National Weather Service field offices in Juneau, Alaska and Fairbanks, Alaska. The center employs model suites including distributed snowmelt models, streamflow routing, and ensemble prediction systems used in parallel by organizations like the National Water Center and Hydrologic Ensemble Forecast Service. Services support transportation corridors managed by the Alaska Railroad and aviation operations at airports such as Ted Stevens Anchorage International Airport and Fairbanks International Airport. It provides situational awareness during events affecting federally managed lands like Denali National Park and Preserve and coastal resources overseen by the National Marine Fisheries Service.

Organizationally the center is staffed by hydrologists, modelers, software engineers, and operations meteorologists who coordinate with regional National Weather Service offices and research partners including the University of Alaska Anchorage, University of Alaska Fairbanks, and federal laboratories such as the Pacific Marine Environmental Laboratory. Staffing supports 24/7 operations during peak seasons and employs liaisons for tribal governments including the Alaska Native Tribal Health Consortium and regional tribal entities like the Yukon-Kuskokwim Health Corporation. Management interacts with headquarters units such as the Office of Water Prediction and program offices within the National Ocean Service.

The center relies on a wide array of observational networks and remote sensing platforms provided by partners like the United States Geological Survey streamgages, NOAA Weather Radio observations, GOES satellites, and polar-orbiting systems used by National Oceanic and Atmospheric Administration programs. Snow and ice data are derived from field observations coordinated with the Alaska Snow Survey and research from the Cold Regions Research and Engineering Laboratory and the University of Alaska Fairbanks's geophysical institutes. Numerical guidance comes from models such as the National Water Model, ensemble systems developed by the National Oceanic and Atmospheric Administration's hydrologic research teams, and data assimilation efforts involving the National Centers for Environmental Prediction and the Hydrologic Research Laboratory. Communication and dissemination use platforms like the National Weather Service Advanced Hydrologic Prediction Service and coordination with emergency communication systems used by the Federal Emergency Management Agency.

The center has supported responses to significant hydrologic events including spring breakup floods on the Yukon River, coastal inundation associated with storm surges affecting communities such as Nome, Alaska and Bethel, Alaska, and seasonal snowmelt-driven floods impacting the Susitna River basin. It played a role during regional responses to weather patterns linked to El Niño–Southern Oscillation episodes and coordinated forecasts during the aftermath of seismic events like the 1964 Alaska earthquake in terms of secondary hydrologic impacts. Coordination with the Federal Emergency Management Agency, Alaska Division of Homeland Security and Emergency Management, and tribal governments has been essential during evacuations, infrastructure protection efforts involving the Alaska Railroad, and interagency recovery operations.